Bucket-wheel for elastic-fluid turbines.



No. 804,418. PATENT H. KELLER. BUCKET WHEEL FOR ELASTIC FLUID TURBINES.

APPLIQATION FILED Max: 64, 1905.

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Q U L Witnesses construction HULDREICH KELLER. OF BERLIN.

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HERMA Y. ASSlHNOH 'lO GEN iililii EUlL El ilET liIhlEl-EIL FGW ELASTlG FLlJliD 'lhli fili li'ii.

no. eceeio.

Specification of Letters Patent.

Patented Nov. lei, 2.9935.

Application filed May 4, 1905. Serial lio. 258,79Q.

To ail whom it may concern:

lie it known that l, lFlULDREIOH KELLER, a :itizen of Switzerland, residing at Berlin, Gen many, have invented certain new and useful improvements in Bucket-Wheels forElzistic Fluid Turbines, of which the following is a specification.

in the construction of huchehwhecls for tcrhines heriog high peripheral speedspeciai care must be exercised in proportioniog the tl'iickness oi the stock forming; the hub and web. This is particularly true where the wheel is bored centrally to receive the shaft. in order that the strains near the center of the wheel shell not exceed a certain amount, the hub mode very long" and heavy. Such :1 found in the Well-known Level Wheels. Vi/l'iecls having these long and heavy hubs with a. large mess near the hub ere difli cult to cast on account of unequal strains, which give rise to the formation of cracks, and. thereby decrease the strength of the wheel. it is zilsodil'licult to properly beleuce H. wheel of this lesthientioned character. An other objection to this construction, due to the long hubs, resides in the feet that the main bodies of thew heels in o multistage ma. chine have to be widely segmratcd, which means increased over-ell length. )wing to the great weight of the. wheels. the shaft is necesssrilr lit? with high surface friction, and is sol'ijectcd to a considerable bending, mo merit. which necessitates on ihtermediriie or middle hearing. This introduces the co1nplication diriled machine and on extra. he: ig.

'ilhe present invention has for its object to owrcoroc the OlljBC'hlOllS above pointed out one to provid e wlircl which has a relatively iight hob, yet is notiply strong to withstand hoary centrifugal strains. in oshcr words, the object oi ti '2 invention is to save n'mterifil without sacrificing strength and at the some time reduce the total length of the shaft for it given iiumliinc.

in carrying out my invention the wheel'- wch orcwided with e SLilljillJlj/fOl'lflGd rim for so irting one or more rows of buckets.

1. or: buckets only or mode and attached in any wol 'i he web is gradually lknown monoer. more i in thickness towerd the Silil-firfli'lllilfi it terminates in e. relatively enroll hub having;

no or i'uorc peripheral grooves. the rrooro or ,ig'rooros is e predetermined amount of steel or other tough wire. which is preferably dnctilc and oi high tensile rogth. The tension of the who should he u'icusurod as it is applied to the huh. so as to give the bond the strength \Jllifilhl dynamic celculo shows to be correct. lifter the wire or :e wound. in place it should not be subjected to excessive heat.

in the accompanying drawii'igs, which illustrate one embodiment of my invention, Figure 1 is an axial section of 1-; Laval wheel in tended for high peripheral speeds. l lo. 2 is a partial aerial section of on i'ildsi'. vle wheel a so intended For high peripheral or luickct speeds. and Fig. 3 is an axial section of a wheel built in uccm-donco with any invention.

in Fig. 1 it wil be soon that the length of the hub is very great as couu'mrcd with the diameter of the wheel. also that the hub and the portion of the web :uijoccut thereto conmin a very large mass of n toil.

lnliig. 2. a large whoo is shown having two rows of buckets iota. led to revolve at a high speed, olthiiiugh sorucwl'uit lower then the one shown in Fig: l. The large sir amid mess of metal in the hub and nilizmcni port of the web is, however. plainly uoiiccchlc.

' in Fig. il is'i'shown :1 wheel (:(m iru -c accordance with my invention and i forhigh peripheral speeds. The long... huh has been decreased by hull and amount oi. motel has hcou sm'od both hub and in the web adjacent to the llill). ducing; the weight of the wheels means the shaft can be shorter and of less diiunco Th at i. and wound in these grooves are hands of Wl'it'; 55. This wire should be strong; and be wound on the hub under tension and the ends iu'opcrly secured. The amount of wire will oi course depend upon the speed at which the wheel is to be rotated.

in accordance with the provisions of the potent statutes i have described the principle of operation of my invention. together with the npporzrtus which ll now consider to represeut the best embodiment thereof; but i desire to have it uodcrstoml that. the apparatus shown col illusirative and that the invention can be carried out by other means.

by Let-tors lutcnt of the United States. is

Wound in l bincs, thecombination oi u webhevingr o. rchr hat 1 claim as new, and desire to secure hub on each side of the we!) is groove...

1. in e bucket-wheel for elesiiicdluid tur- Lively small grooved hub, a wire band having l pusltu sides of the web, lmlupcnnlunb bmuls of high tensile strength winch 1s Wound in he 7 Wm: which are wound in the grooves under groove under tension for mcreusmg the tunsum. zmrl buckets curl-ml by the web for Strength of the hub, and buckets (carried by musing rotation. I5 5 the web for causing rnmtlun. 1n WllAl rSH wburcol' 1 1mm: lu-ruunto set my 1n :1 buclmL-wheel fur elusmc-lluhl lZLlY- hum! Llns 18th (lay of April, 1905. x r 1 v l 24110.5, ths uommmbmn 1 a web hum lwlm v l ,7

1 4 l T I Q ally increases m .znmunr. a from Hm rm: in- UHLH kLLLLL' Ward the will: ml is prm lllml with z'ulw Witnmsus:

tix'ely small ll lfl wbin'b prujuuts ml each shin lil mllm Knmss,

ol he} web, grooves formed 1n Llm hub m up r m-zmuun WAum-m. 

